Domainchecker on main site, no redirect

Hi,

I want to put a domein availability check on my main page, but as it is not userfriendly to redirect after the check to another page (whmcs in this case), I want to post the results underneath the form with jQuery.

However, I checked and domainchecker.php does not give any response.. Does anyone know how to achieve this? I want to give my customers the option to register the domain, not 'force' them..

So in short:
domain-check form on main site -> check availability -> response on same page, no refresh..

Thanks :)

I want to do this for a lot of features, for instance, "add to cart" etc.. :)